Compelling observational evidence is given that metric expansion of space occurs at all scales of distance in the universe, in contradiction to orthodox expectation. This includes recent astronomical observations and the results of recent terrestrial experiments made possible by improvements in the sensitivity and stability of measuring instruments and techniques. Consequences of universal metric expansion on terrestrial measurements include an increase with

time of the apparent speed of light, and an apparent speed of high-energy particles greater than the speed of light, but with both not exceeding light speed through the expanding space. It is shown that these effects might be directly observed and measured with existing apparatus.